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Finding the Fourth Proportional to 13,250, 18,285 and 12,260.72

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Solution

The fourth proportional to 13,250, 18,285 and 12,260.72 is: 16,919.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,250 : 18,285 = 12,260.72 : x
  2. Step 2: Convert to fraction form
    13,250/18,285 = 12,260.72/x
  3. Step 3: Cross multiply
    13,250x = 18,285 × 12,260.72
  4. Step 4: Simplify right side
    13,250x = 224,187,265.20
  5. Step 5: Solve for x
    x = 224,187,265.20/13,250
  6. Step 6: Final answer
    x = 16,919.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.